US2032594A - Heat regulator for stove ovens - Google Patents

Description

March 3, 1936. w ROGERS 2,032,594

HEAT REGULATOR FOR STOVE OVENS I Filed Feb. 12, 1932 2 Sheets-Sheet 1 March 3, 1936. w. F. ROGERS HEAT REGULATOR FOR STOVE OVENS Filed Feb. 12, 1952' 2 Sheets-Sheet 2 uullilllm M'fzsse.

Patented Mar. 3, 1936 UNITED STATES PATENT OFFICE,

2,032,594 .HEAT REGULATOR FOR STOVE OVENS Walter F. Rogers, Cicero, Ill., assignor to Crown Stove Works, Cicero, 111., a corporation of Illi- I nois Application February 12, 1932, Serial No. 592,482 5 Claims. (Cl. 236-45) The main objects of this invention are to provide a stove having an improved form of regulator for controlling the heat of the oven; to proyide improved means for mounting the regulator on the stove; and to provide a construction of this kind which is particularly adapted for use in connection with gas ranges of the cabinet type.

An illustrative embodiment of this invention is shown in the accompanying drawings, wherein:-

Figure 1 is a fragmentary'vertical section of a stove to which the regulator is applied.

Figure 2 is a fragmentary perspective of the same. a

Figure 3 is a fragmentary top plan of the same, showing certain portions in dotted outline. Figure 4 is an enlarged vertical section, taken on the line 4-4 of Figure 2.

In the form shown, the regulator is applied to a gas stove comprising a frame I having a front wall 2, rear wall 3, end walls 4 and a fixed horizontaltop 5. Supported within the frame, are a top lining 6, rear lining 8, side linings 8 and a horizontalpartition 9 arranged to define a main oven Ill and a broiler oven ll. A'burner i2 is located in the upper part of the broiler oven for heating both ovens.

Located alongside the main oven, is a burner box I3 having the usual burner top 14. A hinged cover I5 is adapted to overlie the burner top when the burner top is not in use. When the burner top is in use, this hinged cover serves as a splasher plate, as shown in Figure 2. This hinged cover is described and claimed in my Patent No. 1,831,- 546 issued November 10,4931. This cover I5 has a rear fence "5, which, when the cover is closed, is allned with a similar fence ll extending along the rear edge of thefixed top 5.

Located within the burner box l3, are the usual burners, not shown, which are supplied with gas from a manifold l8 extending along the front part of the burner box.

Gas is conducted from the manifold It to the oven burner l2 through a conduit including a plurality of connected pipes I9, 20, 24 and. 22. The pipe l9 extends rearwardly through the burner box and is controlled by a valve 23.

The flow of gas from the manifold to the oven burner is controlled by a heat regulator 24, which is mounted on the rear wall 3 of the frame. This regulator includes a valve body 25 having achamber 26 communicating with the pipe 20 and a chamber 21 L communicating with the pipe 2|.

The passage of gas from the chamber 26 to the chamber 21 is controlled by a valve 28 adapted to seat against a seat 29. The valve is adapted to be closed by a spring 3!] bearing between the valve and a nut 3 l. The valve 28 is normally held open by a horizontal pin 32, which is adapted to be actuated by a bi-metallic thermostatic strip 5 33 located in a pocket 34 formed in the rear wall of the stove.- The pocket 34 communicates with the main oven so that the thermostatic strip 33 is exposed to the oven heat. The thermostatic strip 33 is suspended from an axially adjustable pin 35 mounted in a bearing part 36. Extending across the central portion of the thermostatic strip 33, is a pin 31 mounted in a bracket 38, so as to normally hold the strip 33 firmly against the pin 32 to keep the valve open. When the strip 33 is heated beyond a certain temperature, it bends away from the valve body, thereby permitting the valve to close under the action of the spring 3@. i

The thermostatic strip 33 is manually adjustable by means of a rocker arm 39 and'a knob 40. The rocker arm 39 is pivoted on a pin 4| mounted in a channel 42. The lower end of the arm 39 bears against the rear end of the pin 35 and its upper end bears against the rear end of a shaft 43 which carries the knob 48. The shaft 43 is threaded in a bearing part 44 which projects forwardly through a cup 45 which is seated in an aperture 46 formed in the fence ll of the fixed top 5. The cup 45 is secured to the fence H by a retaining ring 4? which engages the front face of the fence.

Mounted on the shaft 43 adjacent the knob, is a dial 48 which may be suitably marked to Iindicate oven temperatures. Rotation of the knob is yieldingly resisted by a spring 49 which bears between the cup 45 and a collar 50 on the shaft. Rotation of the knob is limited by a stop 5i mounted on the cup 45 in position to engage a pin 52 on the dial 43.

In operation, the thermostatic strip 33 is normally positioned so as to hold the valve open, thereby permitting the gas'to enter the oven burner through the pipes 19, 20, 2i and 22. when the desired oven temperature is reachedthe strip 33 bends so as to permit closing of the valve 28 by the spring 30. Whenthe oven cools below the desired temperature, the strip 33 straightens so as to open the valve 28 against the action of the spring 30. In order to effect automatic lighting of the oven burner when the valve 28 is reopened, a pilot tube 53 leads to the burner from the pipe It. The thermostat may be readily adjusted by the knob 40 which is conveniently located on the rear fence ll.

It will be understood that certain details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim:

l. A stove comprising a frame having an oven compartment, a gas burner in said oven, a horizontal top on said frame above said oven, a vertical fence extending along the rear edge of said top, a burner box arranged on said frame alongside said horizontal top, a gas manifold located in said burner box adjacent the front wall of the frame, a gas pipe providing communication between said manifold and burner, a heat regulator for controlling the passage of fuel through said pipe, said regulator having a temperature-responsive element projecting through an opening in the rear wall of said oven, a manually operable adjusting member mounted on said fence, and a connection between said member and element.

2; In an oven ofthe class described, a rear oven wall, a projecting flange extending above said oven wall, selecting means mounted on said flange, thermally. sensitive means disposed within said oven, a pivoted lever extending along the rear wall of said oven, and means for transmitting movement of said selecting means through said lever to said thermally sensitive element.

3. A heat regulator adapted to be disposed upon the rear wall of an oven comprising temperatureselecting means mounted upon the top of said oven, a thermally sensitive element disposed within said oven, control means mounted on the exterior surface of the rear wall of said oven, and motion transmitting means mounted exteriorly of said oven to transmit the setting of said selecting means to said control means.

4. In combination, an oven having a rear wall and a top wall, a thermal sensitive device disposed within the oven adjacent the rear wall, a control device mounted at the rear of the oven and connected with said thermal sensitive device through said rear .wall, a temperature selecting device mounted adjacent the rear and above the top wall of the oven, and connecting means extending from said selecting device along the rear wall of the oven and connected to said thermal sensitive device through said rear wall.

5. The combination with a range including an oven, 01' temperature regulating means comprising a thermostat extending into the oven from the rear thereof, a thermostatic valve mounted adjacent the rear wall of the oven, and means including a dial mounted at the rear of and extending above the top of the oven for adjusting said thermostat and thermostatic valve relative to each other.

' WALTER F. ROGERS.

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